on a horizontal number line . numbers to the left are less than numbers to the right .. numbers to the right are less than numbers to the left
ANSWER
No, because there is no common ratio
EXPLANATION
The given sequence is
-1, 1, 4, 8
If this sequence is geometric, then there should be a common ratio among the consecutive terms.

Hence the sequence
-1, 1, 4, 8
is not a geometric sequence.
10x^2-4x is your answer! :)
3.2 gallons of paint is needed since 2640 divided by 825 = 3.2